If in function `skip_spaces' the routine `skip_comment' comes to the
end of buffer, `cur' is still increased by one, so we need to check
for `p >= limit' and not `p == limit'.
* src/psaux/psconv.c (PS_Conv_Strtol, PS_Conv_ToFixed,
PS_Conv_ASCIIHexDecode, PS_Conv_EexecDecode): Fix boundary checking.
* src/truetype/ttinterp.c (Ins_MIRP): Typo, present since ages. The
code is now in sync with the other operators (e.g. MSIRP) which
modify twilight points.
* src/bdf/bdflib.c (_bdf_list_ensure): Bring code in sync with
comment before `_bdf_list_split', this is, really allocate at least
five `field' elements.
* src/bdf/bdflib.c (_bdf_parse_glyphs) <DWIDTH, BBX>: Abort if
_BDF_ENCODING isn't set. We need this because access to the `glyph'
variable might be undefined otherwise.
* src/smooth/ftsmooth.c (ft_smooth_render_generic): Use `FT_Pos'
instead of `FT_UInt' for some variables and update comparisons
accordingly. A detailed analysis can be found in the bug report.
* src/type1/t1load.c (parse_subrs): Add proper guards for `strncmp'.
* src/psaux/psobjs.c (ps_parser_skip_PS_token): Emit error message
only if cur < limit.
Jump instructions are now bound to the current function. The MS
Windows rasterizer behaves the same, as confirmed by Greg Hitchcock.
* src/truetype/ttinterp.h (TT_CallRec): Add `Cur_End' element.
* src/truetype/ttobjs.h (TT_DefRecord): Add `end' element.
* src/truetype/ttinterp.c (DO_JROT, DO_JMPR, DO_JROF): Check upper
bound of jump address.
(Ins_FDEF, Ins_CALL, Ins_LOOPCALL, Ins_UNKNOWN, TT_RunIns): Updated.
* include/freetype/internal/ftobjs.h (FT_ModuleRec, FT_LibraryRec):
Remove `generic' field since users can't access it.
* src/base/ftobjs.c (FT_Done_GlyphSlot): Call `generic.finalizer' as
advertised in the documentation of FT_Generic.
(Destroy_Module, FT_Done_Library): Updated to changes in `ftobjs.h'.
Patch submitted by anonymous reporter.
* src/gxvalid/gxvcommn.c (gxv_XStateTable_subtable_setup):
gxv_set_length_by_ulong_offset() must be called with 3, not 4,
the number of the subtables in the state tables; classTable,
stateArray, entryTable.
Based on the patch provided by Erik Dahlstrom <ed@opera.com>,
http://lists.gnu.org/archive/html/freetype-devel/2012-01/msg00010.html
Also `raccess_guess_table[]' and `raccess_rule_by_darwin_vfs()'
are renamed with `ft_' suffixes.
* src/base/ftbase.h: `raccess_rule_by_darwin_vfs()' is renamed
to `ft_raccess_rule_by_darwin_vfs()'.
* src/base/ftobjs.c: Ditto.
* src/base/ftrfork.c: Declarations of FT_RFork_Rule,
raccess_guess_rec, are moved to...
* include/freetype/internal/ftrfork.h: Here.
* include/freetype/internal/ftrfork.h:
FT_RFORK_RULE_ARRAY_{BEGIN,ENTRY,END} macros are defined
to replace raccess_guess_table[] in both of PIC and non-PIC
modes.
* src/base/ftrfork.c: raccess_guess_table[] array is rewritten
by FT_RFORK_RULE_ARRAY_{BEGIN,ENTRY,END}.
* src/base/basepic.h (BasePIC): Add `ft_raccess_guess_table'
storage. (FT_RACCESS_GUESS_TABLE_GET): New macro to retrieve
the function pointer from `ft_raccess_guess_table' storage in
`BasePIC' structure.
* src/base/ftrfork.c (FT_Raccess_Guess): Rewritten with
FT_RACCESS_GUESS_TABLE_GET.
(raccess_get_rule_type_from_rule_index): Add `library' as the
first argument to the function, to retrieve the storage of
`ft_raccess_guess_table' from it. Also `raccess_guess_table'
is replaced by FT_RACCESS_GUESS_TABLE_GET.
(ft_raccess_rule_by_darwin_vfs): Ditto.
* src/autofit/afpic.c: Include "aflatin2.h" when
FT_OPTION_AUTOFIT2 is defined, as afglobal.c does so.
Unconditionally inclusion causes declared but unimplemented
warning by GCC 4.6.
* src/cff/cffpic.c: The declarations of
FT_Init_Class_cff_cmap_encoding_class_rec() and
FT_Init_Class_cff_cmap_unicode_class_rec() are removed.
They can be obtained by the inclusion of cffcmap.h.
cffcmap.h invokes FT_DECLARE_CMAP_CLASS() and it declares
FT_Init_Class_cff_cmap_encoding_class_rec() etc in PIC mode.
Originally FT_DEFINE_{DRIVER,MODULE,RENDERER}() macros were
designed to declare xxx_pic_{free,init} by themselves.
Because these macros are used at the end of the module
interface (e.g. ttdriver.c) and the wrapper source to build
a module as a single object (e.g. truetype.c) includes
the PIC file (e.g. ttpic.c) before the module interface,
these macros are expanded AFTER xxx_pic_{free,init} body
when the modules are built as single object.
The declaration after the implementation causes the redundant
declaration warnings, so the declarations are moved to module
PIC headers (e.g. ttpic.h). Separating to other header files
are needed for multi build.
* include/freetype/internal/ftdriver.h (FT_DEFINE_DRIVER):
Remove class_##_pic_free and class_##_pic_init declarations.
* include/freetype/internal/ftobjs.h (FT_DEFINE_RENDERER,
FT_DEFINE_MODULE): Ditto.
* src/base/basepic.h: Insert a comment and fix coding style.
* src/autofit/afpic.h: Declare autofit_module_class_pic_{free,
init}.
* src/cff/cffpic.h: Declare cff_driver_class_pic_{free,init}.
* src/pshinter/pshpic.h: Declare pshinter_module_class_pic_{free,
init}.
* src/psnames/pspic.h: Declare psnames_module_class_pic_{free,
init}.
* src/raster/rastpic.h: Declare
ft_raster{1,5}_renderer_class_pic_{free,init}
* src/sfnt/sfntpic.h: Declare sfnt_module_class_pic_{free,init}.
* src/smooth/ftspic.h: Declare
ft_smooth_{,lcd_,lcdv_}renderer_class_pic_{free,init}.
* src/truetype/ttpic.h: Declare tt_driver_class_pic_{free,init}.
* src/base/ftglyph.c (FT_Glyph_To_Bitmap): `glyph' must be
set before derefering to obtain `library'. The initialization
of `clazz', `glyph', `library' and NULL pointer check are
reordered to minimize PIC conditonals.
* src/base/ftinit.c (FT_Add_Default_Modules): Under PIC
configuration, FT_DEFAULT_MODULES_GET returns
FT_Module_Class** pointer, GCC 4.6 warns that
const FT_Module_Class* const* variable is warned as
inappropriate to store it. To calm it, explicit cast is
inserted. Also `library' is checked to prevent the NULL
pointer dereference in FT_DEFAULT_MODULES_GET.
Under PIC configuration, FT_{CFF,PSCMAPS,SFNT,TT}_SERVICES_GET
take no arguments but derefer the variable named `library'
internally.
* src/cff/cffdrivr.c (cff_get_interface): Declare `library' and
set it if non-NULL driver is passed.
* src/truetype/ttdriver.c (tt_get_interface): Ditto.
* src/sfnt/sfdriver.c (sfnt_get_interface): Declare `library'
under PIC configuration, and set it if non-NULL module is given.
* src/psnames/psmodule.c (psnames_get_interface): Ditto.
error codes with per-module prefix.
* src/autofit/afpic.c: Include `aferrors.h'.
* src/cff/cffpic.c: Include `cfferrs.h'.
* src/pshinter/pshpic.c: Include `pshnterr.h'.
* src/raster/rastpic.c: Include `rasterrs.h'.
* src/sfnt/sfntpic.c: Include `sferrors.h'.
* src/smooth/ftspic.c: Include `ftsmerrs.h'.
* src/truetype/ttpic.c: Include `tterrors.h'.
Originally FT_MACINTOSH was a pure auto macro and DARWIN_NO_CARBON
was a configurable macro to disable Carbon-dependent code. Because
now configure script sets DARWIN_NO_CARBON by default and disables
Darwin & Carbon-dependent codes, these macros can be unified.
FT_MACINTOSH (undefined by default) is kept and DARWIN_NO_CARBON
(defined by default) is removed, because DARWIN_NO_CARBON violates
FT_XXX naming convention of public macros, and a macro configured by
default is not portable for the building without configure (e.g.
make devel).
* builds/unix/configure.raw: Define FT_MACINTOSH if Carbon-based
old Mac font support is requested and Carbon is available.
* builds/unix/ftconfig.in: Undefine FT_MACINTOSH when the support
for Mac OS X without Carbon (e.g. Mac OS X 10.4 for ppc64) is
requested.
* include/freetype/config/ftconfig.in: Ditto.
* builds/vms/ftconfig.h: Ditto.
* src/base/ftbase.h: Remove DARWIN_NO_CARBON.
* src/base/ftbase.c: Ditto.
* src/base/ftobjs.c: Ditto.
* src/base/ftrfork.c: Ditto.
* src/base/ftmac.c: Compile the body if FT_MACINTOSH is defined
(same with TT_USE_BYTECODE_INTERPRETER in ttinterp.c).
* builds/mac/ftmac.c: Ditto.
* builds/mac/FreeType.m68k_cfm.make.txt: Define FT_MACINTOSH.
* builds/mac/FreeType.m68k_far.make.txt: Ditto.
* builds/mac/FreeType.ppc_classic.make.txt: Ditto.
* builds/mac/FreeType.ppc_carbon.make.txt: Ditto.
* builds/toplevel.mk: Check `/dev/null' to identify the Unix-
like systems without `init' nor `hurd' (e.g. Mac OS X >= 10.4).
* builds/unix/detect.mk: Ditto.
* src/tools/apinames.c (names_add): Change the type of `h' from
int to unsigned int, to prevent undefined behaviour in the
overflow of signed integers (overflow of unsigned int is defined
to be wrap around). Found by clang test suggested by Sean
McBride.
ENCODING now covers the whole Unicode range.
Note, however, that this change is quite expensive since it
increases the size of three arrays by almost 400kByte in total. The
right fix is to replace the logic with something smarter.
Additionally, there exist very old BDFs for three-byte CCCII
encoding which exceeds the range of Unicode (another reason to have
a smarter logic).
* src/bdf/bdf.h (bdf_font_t): Increase size of `nmod' and `umod'
arrays.
* src/bdf/bdflib.c (bdf_parse_t): Increase size of `have' array.
Previously, FreeType misleadingly returned
FT_Err_Unknown_File_Format if a module was missing (or a test was
missing completely).
* include/freetype/fterrdef.h (FT_Err_Missing_Module): Define.
* src/cff/cffobjs.c (cff_face_init), src/cid/cidobjs.c
(cid_face_init), src/sfnt/sfobjs.c (sfnt_init_face),
src/truetype/ttobjs.c (tt_face_init), src/type1/t1objs.c
(T1_Face_Init), src/type42/t42objs.c (T42_Face_Init,
T42_Driver_Init): Updated.
* src/type1/t1afm.c (T1_Read_Metrics), src/type/t1objs.c
(T1_Face_Init), src/type42/t42objs.c (T42_Face_Init): Remove now
redundant test for `psaux'.
This allows a Type 1 font face to be interrogated to retrieve most
of the dictionary keys (keys not relevant to FreeType's Type 1
interpreter are not available).
* include/freetype/internal/services/svpsinfo.h
(PS_GetFontValueFunc): New typedef.
(PSInfo): Add `ps_get_font_value'.
(FT_DEFINE_SERVICE_PSINFOREC): Updated.
* include/freetype/internal/t1types.h (T1_EncodingType): Moved to...
* include/freetype/t1tables.h: Here.
(PS_Dict_Keys): New enumeration.
(FT_Get_PS_Font_Value): New declaration.
* src/base/fttype1.c (FT_Get_PS_Font_Value): New function.
* src/type1/t1driver.c (t1_ps_get_font_value): This new function
does the real job.
(t1_service_ps_info): Add it.
* src/cff/cffdrivr.c (cff_service_ps_info), src/cid/cidriver.c
(cid_service_ps_info), src/type42/t42drivr.c (t42_service_ps_info):
Updated.
* src/cid/cidload.c (cid_load_keyword) <default>,
(parse_font_matrix, parse_expansion_factor): Correctly check number
of dictionaries.
(cid_read_subrs): Protect against invalid values of `num_subrs'.
Assure that the elements of the `offsets' array are ascending.
* src/base/ftbase.h (raccess_rule_by_darwin_vfs): Do not declare
it on native Mac OS X.
* src/base/ftrfork.c (raccess_get_rule_type_from_rule_index):
Hide raccess_get_rule_type_from_rule_index() on native Mac OS X
too.
* include/freetype/config/ftstdlib.h (FT_USHORT_MAX): New macro.
* src/base/ftbitmap.c (FT_Bitmap_Convert): Protect against invalid
value of `target->rows'.
* src/psaux/t1decode.c (t1_decoder_parse_charstrings): Add check for
flex start.
* src/raster/ftrend1.c (ft_raster1_render): Check `width' and
`height'.
* src/truetype/ttgxvar.c (TT_Vary_Get_Glyph_Deltas): Protect against
invalid values in `localpoints' array.
Problem reported by Nicolas Rougier <Nicolas.Rougier@inria.fr>.
* src/tools/glnames.py (adobe_glyph_list): Add data from AGL's
`zapfdingbats.txt' file.
* src/psnames/pstables.h: Regenerated.
* src/lzw/ftzopen.c (ft_lzwstate_io) <FT_LZW_PHASE_CODE>:
Ensure that subsequent (modulo garbage byte(s)) LZW_CLEAR codes are
handled as clear codes. This also re-sets old_code and old_char to
predictable values, which is a little better than using `random'
ones if the code following LZW_CLEAR is invalid.
Stack larger than 1<<LZW_MAX_BITS is never needed if prefix table is
constructed correctly. It's even less than that, see e.g.
libarchive code comment for a better size upper bound:
http://code.google.com/p/libarchive/source/browse/trunk/libarchive/archive_read_support_filter_compress.c?r=3635#121
This patch adds explicit stack size limit, enforced when stack is
realloced.
An alternative is to ensure that code < state->prefix[code - 256]
when traversing prefix table. Such check is less efficient and
should not be required if prefix table is constructed correctly in
the first place.
* src/lzw/ftzopen.c (ft_lzwstate_stack_grow): Implement it.
LZW decompressor did not sufficiently check codes read from the
input LZW stream. A specially-crafted or corrupted input could
create a loop in the prefix table, which leads to memory usage
spikes, as there's no decompression stack size limit.
* src/lzw/ftzopen.c (ft_lzwstate_io) <FT_LZW_PHASE_START>: First
code in valid LZW stream must be 0..255.
<FT_LZW_PHASE_CODE>: In the special KwKwK case, code == free_ent,
code > free_ent is invalid.
* src/cff/cfftypes.h (CFF_FontRecDictRec): New member
`has_font_matrix'.
* src/cff/cffparse.c (cff_parse_font_matrix): Set it.
Update tracing output.
* src/cff/cffobjs.c (cff_face_init): Use it so that the heuristics
can be removed.
Found with font fuzzying.
* src/psaux/t1decode.c (t1_decoder_parse_charstrings): Check
`decoder->buildchar'.
* src/type1/t1load.c (t1_load_keyword): Check `blend->num_designs'.
When shifting right a signed value, it is not defined by the
C standard whether one gets a sign extension or not. Use a macro to
do an explicit cast from a signed short (assuming that this is
16bit) to an int.
* src/psaux/t1decode.c (Fix2Int): New macro.
Use it where appropriate.
We want to unset FT_FACE_FLAG_SCALABLE only if there are bitmap
strikes in the font.
* src/truetype/ttobjs.c (tt_face_init): Implement it.
* docs/CHANGES: Updated.
The main problems
-----------------
o If FT_STROKER_LINEJOIN_BEVEL was specified, unlimited miter
joins (not bevel joins) were generated. Indeed, the meanings of
`miter' and `bevel' were incorrectly reversed (consistently) in
both the code and comments.
o The way bevel joins were constructed (whether specified
explicitly, or created as a result of exceeding the miter limit)
did not match what is required for stroked text in PostScript or
PDF.
The main fixes
--------------
o The behaviour of FT_STROKER_LINEJOIN_BEVEL has been corrected.
o A new line join style, FT_STROKER_LINEJOIN_MITER_FIXED, has been
introduced to support PostScript and PDF miter joins.
o FT_STROKER_LINEJOIN_MITER_VARIABLE has been introduced as an
alias for FT_STROKER_LINEJOIN_MITER.
Additionally, a variety of stroking errors have been fixed. These
would cause various artifacts (including points `at infinity'),
especially when stroking poor quality fonts.
See
http://lists.gnu.org/archive/html/freetype-devel/2011-07/msg00001.html
for example documents. The FreeType stroker now produces results
very similar to that produced by GhostScript and Distiller for these
fonts.
Other problems
--------------
The following problems have been resolved:
o Inside corners could be generated incorrectly. Intersecting the
inside corner could cause a missing triangular area and other
effects.
The intersection point can only be used if the join is between
two lines and both lines are long enough. The `optimization'
condition in `ft_stroker_inside' has been corrected; this
requires the line length to be passed into various functions and
stored in `FT_StrokerRec'.
o Incorrect cubic curves could be generated. The angle
calculations in `FT_Stroker_CubicTo' have been corrected to
handle the case of the curve crossing the +/-PI direction.
o If the border radius was greater than the radius of curvature of
a curve, then the negative sector would end up outside (not
inside) the border. This situation is now recognized and the
negative sector is circumnavigated in the opposite direction.
(If round line joins are being used, this code is disabled
because the line join will always cover the negative sector.)
o When a curve is split, the arcs may not join smoothly (especially
if the curve turns sharply back on itself). Changes in
direction between adjacent arcs were not handled. A round
corner is now added if the deviation from one arc to the next is
greater than a suitable threshold.
o The current direction wasn't retained if a the outline contained
a zero length lineto or a curve that was determined to be
`basically a point'. This could cause a spurious join to be
added.
o Cubics with close control points could be mishandled. All eight
cases are now distinguished correctly.
Other improvements
------------------
o Borders for cubic curves could be too `flat'.
FT_SMALL_CUBIC_THRESHOLD has been reduced a little to prevent
this.
o The handling and use of movable points has been simplified a
little.
o Various values are now computed only if the results are actually
needed.
o The directions of the outer and inner borders have been swapped,
as recommended by Graham Asher.
* src/base/ftstroke.c: Revised.
* include/freetype/ftstroke.h: Updated.
Passing uninitialized pointer to the buffer allocator is
not problematic theoretically (as far as the returned
pointer is checked before writing), but g++4.6 dislikes
it and warns by -Wuninitialized. Initialize them by NULL.
* src/base/ftobjs.c (FT_Stream_New): Init `stream'.
(new_memory_stream): Ditto.
(FT_New_GlyphSlot): Init `slot'.
(FT_CMap_New): Init `cmap'.
(open_face_PS_from_sfnt_stream): Init `sfnt_ps'.
(Mac_Read_POST_Resource): Init `pfb_data'.
(Mac_Read_sfnt_Resource): Init `sfnt_data'.
* src/base/ftrfork.c (FT_Raccess_Get_DataOffsets):
Init `offsets_internal' and `ref'.
(raccess_guess_darwin_hfsplus): Init `newpath'.
(raccess_guess_darwin_newvfs): Ditto.
* src/base/ftbitmap.c (ft_bitmap_assure_buffer):
Init `buffer'.
* src/base/ftstroke.c (FT_Stroker_New): Init `stroker'.
Some invalid, overrunning, unrecommended non-zero values
are cared in paranoid validation mode only. There are
many lines looking like:
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_xxx;
To simplify them, GXV_SET_ERR_IF_PARANOID( err ) is
introduced for more paranoid validation in future.
* src/gxvalid/gxvcommn.h (IS_PARANOID_VALIDATION):
New macro to assure valid->root->level is more or
equal to FT_VALIDATE_PARANOID. (GXV_SET_ERR_IF_PARANOID):
New macro to raise an error if in paranoid validation.
* src/gxvalid/gxvcommn.c: Use GXV_SET_ERR_IF_PARANOID().
* src/gxvalid/gxvfeat.c: Ditto.
* src/gxvalid/gxvjust.c: Ditto.
* src/gxvalid/gxvkern.c: Ditto.
* src/gxvalid/gxvmort.c: Ditto.
* src/gxvalid/gxvmort0.c: Ditto.
* src/gxvalid/gxvmort1.c: Ditto.
* src/gxvalid/gxvmort2.c: Ditto.
* src/gxvalid/gxvmorx1.c: Ditto.
* src/gxvalid/gxvmorx2.c: Ditto.
* src/gxvalid/gxvmort.c (gxv_mort_subtables_validate):
Conditionalize unvalidated variable `subFeatureFlags'.
(gxv_mort_chain_validate): Conditionalize unvalidated
variable `defaultFlags'.
* src/gxvalid/gxmort0.c
(gxv_mort_subtable_type0_entry_validate): Check the
conflict of the marks for the glyphs.
* src/gxvalid/gxmort1.c
(gxv_mort_subtable_type1_offset_to_subst_validate):
Local variables `min_gid', `max_gid' are replaced by
variables in the validator.
(gxv_mort_subtable_type1_entry_validate): Conditionalize
unvalidated variables; `setMark', `dontAdvance'.
(gxv_mort_subtable_type1_substTable_validate):
Validate the GID by the min/max GIDs in the validator.
* src/gxvalid/gxvmort2.c
(gxv_mort_subtable_type2_ligActionOffset_validate):
Conditionalize unvalidated variables; `last', `store'.
Checking for overrunning offset is added.
(gxv_mort_subtable_type2_entry_validate):
Conditionalize unvalidated variables; `setComponent',
`dontAdvance'.
(gxv_mort_subtable_type2_ligatureTable_validate):
Check if the GID for ligature does not exceed the
max GID in `maxp' table.
* src/gxvalid/gxvmort5.c
(gxv_mort_subtable_type5_InsertList_validate):
Conditionalize unvalidated loading of `insert_glyphID'
array. (gxv_mort_subtable_type5_entry_validate):
Conditionalize unvalidated variables; `setMark',
`dontAdvance', `currentIsKashidaLike',
`markedIsKashidaLike', `currentInsertBefore',
`markedInsertBefore'.
* src/gxvalid/gxvjust.c (gxv_just_check_max_gid):
New function to unify the checks of too large GID.
(gxv_just_wdp_entry_validate): Conditionalize unvalidated
variables; `beforeGrowLimit', `beforeShrinkGrowLimit',
`afterGrowLimit', `afterShrinkGrowLimit', `growFlags',
`shrinkFlags'. Additional check for non-zero values in
unused storage `justClass' is added.
(gxv_just_actSubrecord_type0_validate): Conditionalize
unvalidated variable `order'. GID is checked by
gxv_just_check_max_gid(). Additional check for upside-down
relationship between `lowerLimit' and `upperLimit' is added.
(gxv_just_actSubrecord_type1_validate): GID is checked by
gxv_just_check_max_gid().
(gxv_just_actSubrecord_type2_validate): Conditionalize
unvalidated variable `substThreshhold'. GID is checked by
gxv_just_check_max_gid().
(gxv_just_actSubrecord_type5_validate): GID is checked by
gxv_just_check_max_gid().
(gxv_just_classTable_entry_validate): Conditionalize
unvalidated variables; `setMark', `dontAdvance',
`markClass', `currentClass'.
* src/gxvalid/gxvcommn.h (GXV_LOAD_TRACE_VARS): New macro to
conditionalize the variable which is only used for trace messages.
Automatically set by FT_DEBUG_LEVEL_TRACE.
(GXV_LOAD_UNUSED_VARS): New macro to conditionalize the loading of
unvalidated variables. Undefined by default to calm gcc4.6 warning.
(GXV_ValidatorRec.{min_gid,max_gid}): New variables to hold defined
GID ranges, for the comparison of GID ranges in different subtables.
* src/autofit/afcjk.c (af_cjk_metrics_init_blues): Use casts and
remove unused variables.
* src/autofit/aflatin.c (af_latin_hints_compute_edges): Comment out
`up_dir'.
* src/smooth/ftsmooth.c (ft_smooth_render_generic): Use `height_org'
and `width_org' conditionalized.
The native SDK on earliest Mac OS X (10.0-10.1) did not have
"AvailabilityMacros.h". To prevent the inclusion of missing
header file, ECANCELED (introduced in 10.2) in POSIX header
file <errno.h> is checked to detect the system version.
* include/freetype/config/ftconfig.h: Conditionalize the
inclusion of "AvailabilityMacros.h".
* builds/unix/ftconfig.in: Ditto.
* builds/vms/ftconfig.h: Ditto.
* builds/unix/install-sh: Removed. It is not needed to
include repository, because autogen.sh installs it.
* builds/unix/.gitignore: Register install-sh.
To remove extremas of vertical strokes of CJK Ideographs at
low resolution and make the top and bottom horizontal stems
aligned, bluezones for CJK Ideographs are calculated from
sample glyphs. At present, vertical bluezones (bluezones
to align vertical stems) are disabled by default. For detail, see
http://lists.gnu.org/archive/html/freetype-devel/2011-04/msg00070.htmlhttp://lists.gnu.org/archive/html/freetype-devel/2011-04/msg00092.htmlhttp://lists.gnu.org/archive/html/freetype-devel/2011-05/msg00001.html
* include/freetype/internal/fttrace.h: New trace component `afcjk'.
* src/autofit/afcjk.h (AF_CJK{Blue,Axis,Metric}Rec): Add CJK version
for AF_Latin{Blue,Axis,Metric}Rec.
(af_cjk_metrics_check_digits): Ditto, shared with Indic module.
(af_cjk_metrics_init_widths): Ditto.
(af_cjk_metrics_init): Take AF_CJKMetric instead of AF_LatinMetric.
(af_cjk_metrics_scale): Ditto (declaration).
(af_cjk_hints_init): Ditto (declaration).
(af_cjk_hints_apply): Ditto (declaration).
* src/autofit/afcjk.c (af_cjk_metrics_scale): Ditto (body).
(af_cjk_hints_init): Ditto (body).
(af_cjk_hints_apply): Ditto (body).
(af_cjk_metrics_init_widths): Duplicate af_latin_metrics_init_widths.
(af_cjk_metrics_check_digits): Duplicate af_latin_metrics_check_digits.
(af_cjk_metrics_init): Call CJK bluezone initializer.
(af_cjk_metrics_scale_dim): Add code to scale bluezones.
(af_cjk_hints_compute_blue_edges): New function, CJK version of
af_latin_hints_compute_blue_edges.
(af_cjk_metrics_init_blues): New function, CJK version of
af_latin_metrics_init_blues.
(af_cjk_hints_edges): Add code to align the edge stems to blue zones.
* src/autofit/afindic.c (af_indic_metrics_init): Take AF_CJKMetric
instead of AF_LatinMetric, and initialize as af_cjk_metrics_init.
However bluezones are not initialized.
(af_indic_metrics_scale): Take AF_CJKMetric instead of AF_LatinMetric.
(af_indic_hints_init): Ditto.
(af_indic_hints_apply): Ditto.
* docs/CHANGES: Note about CJK bluezone support.
* builds/unix/configure.raw: New option `--disable-mmap'
is added. It is for the developers to simulate the systems
without mmap() (like 4.3BSD, minix etc) on POSIX systems.
* src/truetype/ttobjs.c (tt_check_trickyness_sfnt_ids):
Add 8 checksum sets for NEC FA family. For the tricky fonts
without some tables (e.g. NEC FA fonts lack cvt table),
extra check is added to assure that 0-length table in the
registry is not included in the font.
Some PDF generators mangle the family name badly, prioritize
the check by the sfnt table checksums than the check by the
family name. For sample PDF, see
http://lists.gnu.org/archive/html/freetype-devel/2011-04/msg00073.html
* src/truetype/ttobjs.c (tt_check_trickyness): Exchange the order
of tt_check_trickyness_family() and tt_check_trickyness_sfnt_ids().
This makes FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH redundant,
deprecated, and ignored. The new behavior is what every major user
of FreeType has been requesting. Global advance is broken in many
CJK fonts. Just ignoring it by default makes most sense.
* src/truetype/ttdriver.c (tt_get_advances),
src/truetype/ttgload.c (TT_Get_HMetrics, TT_Get_VMetrics,
tt_get_metrics, compute_glyph_metrics, TT_Load_Glyph),
src/truetype/ttgload.h: Implement it.
* docs/CHANGES: Updated.
Previously, signed integers were converted to unsigned integers, but
this can fail because of sign extension. For example, 0xa344a1eb
becomes 0xffffffffa344a1eb.
We now do the reverse which is always correct because the integer
size is the same during the cast from unsigned to signed.
* include/freetype/internal/ftstream.h, src/base/ftstream.c
(FT_Stream_Get*): Replace with...
(FT_Stream_GetU*): Functions which read unsigned integers.
Update all macros accordingly.
* src/gzip/ftgzip.c (ft_gzip_get_uncompressed_size): Updated.
This isn't the optimal solution yet, but it restores the previous
rendering quality (more or less).
* src/smooth/ftgrays.c (gray_render_conic): Do more splitting.
* include/freetype/config/ftconfig.h: Ported the FT_MulFix_i386
function from GNU inline assembly syntax (see #ifdef __GNUC__ block
above) to MASM syntax for Microsoft Visual C++.
Patch suggested by Miles.Lau <sunliang_liu@foxitsoftware.com>.
* src/cff/cffgload.c (cff_decoder_parse_charstrings): Emit tracing
message for unknown operators and continue instead of exiting with a
syntax error.
* src/truetype/interp.c: Set even more TT_Err_Invalid_Reference
error codes only if pedantic hinting is active. At the same time,
try to provide sane values which hopefully allow useful
continuation. Exception to this is CALL and LOOPCALL – due to
possible stack corruption it is necessary to bail out.
* src/truetype/ttinterp.c (TT_RunIns, Ins_FLIPPT, Ins_DELTAP,
Ins_DELTAC): Exit with error only if `pedantic_hinting' is set.
Otherwise, try to do something sane.
Thanks to Greg Hitchcock who explained the issue.
* src/truetype/ttinterp.c (Ins_MIRP): Replace a `>=' operator with
`>' since the description in the specification is incorrect.
This fixes, for example, glyph `two' in font `Helvetica Neue LT Com
65 medium' at 15ppem.
* include/freetype/config/ftconfig.h (FT_MulFix_arm):
Copy the maintained code from builds/unix/ftconfig.in.
Old GNU binutils could not accept the reduced syntax
`orr %0, %2, lsl #16'. Un-omitted syntax like RVCT,
`orr %0, %0, %2, lsl #16' is better. Reported by
Johnson Y. Yan. The bug report by Qt developers is
considered too.
http://bugreports.qt.nokia.com/browse/QTBUG-6521
Right before B/W rasterizing, the bbox gets simply rounded to
integers. This fixes, for example, glyph `three' in font `Helvetica
Neue LT Com 65 Medium' at 11ppem.
Thanks to Greg Hitchcock who explained this behaviour.
* src/raster/ftrend1.c (ft_raster1_render): Implement it.
* builds/unix/configure.raw: Consider recent gcc-standard
flags to specify architecture in CFLAGS & LDFLAGS
harmonization. Requested by Savannah bug #32114, to
support multilib feature of BuildRoot SDK correctly.
* builds/unix/configure.raw: Some important options that
included in CFLAGS but not in LDFLAGS are copied to
LDFLAGS, but the last option in CFLAGS was not checked.
This catches a rendering problem with glyph `x' from Tahoma at
10ppem. It seems that the increase of the precision in the change
from 2009-06-11 makes a larger jitter value unnecessary.
* src/raster/ftraster.c (Set_High_Precision): Implement it.
If a drop-out rule would switch on a pixel outside of the glyph's
bounding box, use the right (or top) pixel instead. This is an
undocumented feature, but some fonts like `Helvetica Neue LT Com 65
Medium' heavily rely on it.
Thanks to Greg Hitchcock who explained this behaviour.
* src/raster/ftraster.c (Vertical_Sweep_Drop,
Horizontal_Sweep_Drop): Implement it.
When a node comparator changes the cached nodes during the
search of a node matching with queried properties, the
pointers obtained before the functon should be updated to
prevent the dereference to freed or reallocated nodes.
To minimize the rescan of the linked list, the update is
executed when the comparator notifies the change of cached
nodes. This change depends previous change:
38b272ffbb
* src/cache/ftccache.h (FTC_CACHE_LOOKUP_CMP): Rescan the
top node if the cached nodes are changed.
* src/cache/ftccache.c (FTC_Cache_Lookup): Ditto.
Some node comparators (comparing the cache node content and
the properties specified by the query) can flush the cache
node to prevent the cache inflation. The change may
invalidate the pointers to the node obtained before the node
comparison, so the change should be noticed to the caller.
The problem caused by the cache node changing is reported by
Harsha, see Savannah bug #31923.
* src/cache/ftccache.h (FTC_Node_CompareFunc): Add new
argument `FT_Bool* list_changed' to indicate the change of
the cached nodes to the caller.
(FTC_CACHE_LOOKUP_CMP): Watch the change of the cached nodes
by `_list_changed'.
(FTC_CACHE_TRYLOOP_END): Take new macro argument `_list_changed'
and update it when FTC_Manager_FlushN() flushes any nodes.
* src/cache/ftccback.h (ftc_snode_compare): Updated to fit
with new FTC_Node_CompareFunc type. (ftc_gnode_compare): Ditto.
* src/cache/ftcbasic.c: Include FT_INTERNAL_OBJECTS_H to
use TRUE/FALSE macros. (ftc_basic_gnode_compare_faceid):
New argument `FT_Bool* list_changed' to indicate the change
of the cache nodes, anyway, it is always FALSE.
* src/cache/ftccmap.c: Include FT_INTERNAL_OBJECTS_H to
use TRUE/FALSE macros. (ftc_cmap_node_compare):
New argument `FT_Bool* list_changed' to indicate the change
of the cache nodes, anyway, it is always FALSE.
(ftc_cmap_node_remove_faceid): Ditto.
* src/cache/ftccache.c (FTC_Cache_NewNode): Pass a NULL
pointer to FTC_CACHE_TRYLOOP_END(), because the result is
not needed. (FTC_Cache_Lookup): Watch the change of the cache
nodes by `list_changed'. (FTC_Cache_RemoveFaceID): Ditto.
* src/cache/ftcglyph.c: Include FT_INTERNAL_OBJECTS_H to
use TRUE/FALSE macros. (ftc_gnode_compare): New argument
`FT_Bool* list_changed' to indicate the change of the cache
nodes, anyway, it is always FALSE. (FTC_GNode_Compare):
New argument `FT_Bool* list_changed' to be passed to
ftc_gnode_compare().
* src/cache/ftcglyph.h (FTC_GNode_Compare): Ditto.
* src/cache/ftcsbits.c (ftc_snode_compare): New argument
`FT_Bool* list_changed' to indicate the change of the cache
nodes, anyway. It is updated by FTC_CACHE_TRYLOOP().
(FTC_SNode_Compare): New argument `FT_Bool* list_changed'
to be passed to ftc_snode_compare().
* src/cache/ftcsbits.h (FTC_SNode_Compare): Ditto.
* src/cache/ftcglyph.h (FTC_GNode_Compare): Add the 3rd
argument `FTC_Cache cache' to fit FTC_Node_CompareFunc
prototype.
* src/cache/ftcglyph.c (FTC_GNode_Compare): Ditto. Anyway,
`cache' is not used by its child ftc_gnode_compare().
There are several duplicated codes getting the top node
from a cache by a given hash, like:
idx = hash & cache->mask;
if ( idx < cache->p )
idx = hash & ( cache->mask * 2 + 1 );
pnode = cache->buckets + idx;
To deduplicate them, a cpp-macro to do same work
FTC_NODE__TOP_FOR_HASH( cache, hash ) is introduced.
For non-inlined config, non-ftc_get_top_node_for_hash() is
also introduced.
* src/cache/ftccache.h (FTC_NODE__TOP_FOR_HASH): Declare
and implement inlined version.
(FTC_CACHE_LOOKUP_CMP): Use FTC_NODE__TOP_FOR_HASH().
* src/cache/ftccache.c (ftc_get_top_node_for_hash): Non-
inlined version.
(ftc_node_hash_unlink): Use FTC_NODE__TOP_FOR_HASH().
(ftc_node_hash_link): Ditto.
(FTC_Cache_Lookup): Ditto.
* src/cache/ftcglyph.c (FTC_GNode_Compare): Conditionalized
for inlined config. This function is a thin wrapper of
ftc_gnode_compare() for inlined FTC_CACHE_LOOKUP_CMP()
(see `nodecmp' argument). Under non-inlined config,
ftc_gnode_compare() is invoked by FTC_Cache_Lookup(),
via FTC_Cache->clazz.node_compare().
* src/cache/ftcglyph.h (FTC_GNode_Compare): Ditto.
* src/cache/ftcsbits.c (FTC_SNode_Compare): Ditto,
for ftc_snode_compare().
* src/cache/ftcsbits.h (FTC_SNode_Compare): Ditto.
* src/cache/ftcglyph.h (FTC_GCACHE_LOOKUP_CMP):
FTC_GCache_Lookup() takes the node via a pointer `FTC_Node*',
differently from cpp-macro FTC_CACHE_LOOKUP_CMP().
* Jamfile: Include src/bzip2 to project.
Comments for lzw, gzip, bzip2 are changed to clarify that
they are for compressed PCF fonts, not others.
(e.g. compressed BDF fonts are not supported yet)
Currently, it provides FT_Stream_OpenBzip2() that returns
unimplemented error always, to prevent unresolved symbol
error for the applications designed for Unix systems.
* builds/symbian/bld.inf: Include ftbzip2.h.
* builds/symbian/freetype.mmp: Include ftbzip2.c.
Currently, it provides FT_Stream_OpenBzip2() that returns
unimplemented error always, to prevent unresolved symbol
error for the applications designed for Unix systems.
* builds/mac/FreeType.m68k_cfm.make.txt: Include ftbzip2.c.o.
* builds/mac/FreeType.m68k_far.make.txt: Ditto.
* builds/mac/FreeType.ppc_carbon.make.txt: Include ftbzip2.c.x.
* builds/mac/FreeType.ppc_classic.make.txt: Ditto.
Currently, it provides FT_Stream_OpenBzip2() that returns
unimplemented error always, to prevent unresolved symbol
error for the applications designed for Unix systems.
* builds/amiga/makefile: Include bzip2.ppc.o built from ftbzip2.c.
* builds/amiga/makefile.os4: Include bzip2.o built from ftbzip2.c.
* builds/amiga/smakefile: Ditto.
SYSTEM_ZLIB is used to switch the builtin zlib source
or system zlib source out of FreeType2. But ftbzip2
module has no builtin bzip2 library and always requires
system bzip2 library. Thus SYSTEM_BZ2LIB is always yes,
it is not used.
If we encouter a space in a string then the sbit buffer is NULL,
height and width are 0s. So the check in ftc_snode_compare will
always pass for spaces (comparision with 255). Here the comments
above the condition are proper but the implementation is not. When
we create an snode I think it is the proper way to initialize the
width to 255 and then put a check for being equal to 255 in snode
compare function.
* src/cache/ftcsbits.c (FTC_SNode_New): Initialize sbit widths with
value 255.
(ftc_snode_compare): Fix condition.
We simply ignore such instructions. This is invalid, but it doesn't
harm; and indeed, there exist such subsetted fonts in PDFs.
Reported by Albert Astals Cid <aacid@kde.org>.
* src/cff/cffgload.c (cff_decoder_parse_charstrings)
[cff_op_hlineto]: Ignore instruction if there aren't any arguments
on the stack.
=========================
Tag sources with `VER-2-4-4'.
* docs/CHANGES: Updated.
* docs/VERSION.DLL: Update documentation and bump version number to
2.4.4
* README, Jamfile (RefDoc),
builds/win32/vc2005/freetype.vcproj, builds/win32/vc2005/index.html,
builds/win32/vc2008/freetype.vcproj, builds/win32/vc2008/index.html,
builds/win32/visualc/freetype.dsp,
builds/win32/visualc/freetype.vcproj,
builds/win32/visualc/index.html, builds/win32/visualce/freetype.dsp,
builds/win32/visualce/freetype.vcproj,
builds/win32/visualce/index.html,
builds/wince/vc2005-ce/freetype.vcproj,
builds/wince/vc2005-ce/index.html,
builds/wince/vc2008-ce/freetype.vcproj,
builds/wince/vc2008-ce/index.html: s/2.4.3/2.4.4/, s/243/244/.
* include/freetype/freetype.h (FREETYPE_PATCH): Set to 4.
* builds/unix/configure.raw (version_info): Set to 12:2:6.
start_point, check_points, add_point, add_point1, close_contour
macros.
Remove add_contour macro.
Return error code from t1_builder_start_point and
t1_builder_check_points when there was one (instead of returning 0).
Some Latin TrueType fonts are still expected to be unhinted.
Fix Savannah bug #31645.
* src/truetype/ttobjs.c (tt_check_trickyness): Divided to...
(tt_check_trickyness_family): this checking family name, and
(tt_check_trickyness_sfnt_ids): this checking cvt/fpgm/prep.
(tt_get_sfnt_checksum): Function to retrieve the sfnt checksum
for specified subtable even if cleared by lazy PDF generators.
(tt_synth_sfnt_checksum): Function to calculate the checksum.
Reported by Johnson Y. Yan <yinsen_yan@foxitsoftware.com>.
* src/truetype/ttpload.c (tt_face_load_loca): While sanitizing,
handle case where `loca' is the last table in the font.
Since 2010-07-04, find_variant_selector_charmap() returns
the first cmap subtable always under rogue-compatible
configuration, it causes NULL pointer dereference and
make UVS-related functions crashed.
* src/base/ftobjs.c (Fix find_variant_selector_charmap):
Returns UVS cmap correctly.
UVS supporting functions assume the variation handler functions
are valid. When a font without cmap format 14 is given, these
function pointers are left as NULL, so calling these functions
causes NULL pointer dereference.
* src/base/ftobjs.c (FT_Face_GetCharVariantIndex): Check the pointer
FT_CMap_Class->char_var_index before calling it.
(FT_Face_GetCharVariantIsDefault): Check the pointer
FT_CMap_Class->char_var_default before calling it.
(FT_Face_GetVariantSelectors): Check the pointer
FT_CMap_Class->variant_list before calling it.
(FT_Face_GetVariantsOfChar): Check the pointer
FT_CMap_Class->charvariant_list before calling it.
(FT_Face_GetCharsOfVariant): Check the pointer
FT_CMap_Class->variantchar_list before calling it.
* src/smooth/ftsmooth.c (gray_render_conic): Since version 2.4.3,
cubic deviations have been estimated _after_ UPSCALE, whereas
conic ones have been evaluated _before_ UPSCALE, which produces
inferior rendering results. Fix this.
Partially undo change from 2010-10-15 by using ONE_PIXEL/4; this has
been tested with demo images sent to the mailing list. See
http://lists.gnu.org/archive/html/freetype-devel/2010-10/msg00055.html
and later mails in this thread.
Problem reported by Tom Bishop <wenlin@wenlin.com>; see
thread starting with
http://lists.gnu.org/archive/html/freetype/2010-10/msg00049.html
* src/raster/ftraster.c (Line_Up): Replace FMulDiv with SMulDiv
since the involved multiplication exceeds 32 bits.
* src/cache/ftccache.h (FTC_CACHE_LOOKUP_CMP): Revert
the type of `_idx' from FT_PtrDist (by previous change)
to original FT_UFast, to match with FT_CacheRec.
On LLP64 platforms (e.g. Win64), FT_ULong (32-bit)
variables are inappropriate to calculate hash values
from the memory address (64-bit). The hash variables
are extended from FT_ULong to FT_PtrDist and new
hashing macro functions are introduced. The hash
values on 16-bit memory platforms are changed, but
ILP32 and LP64 are not changed. The hash value in
the cache subsystem is not reverted to the memory
address, so using signed type FT_PtrDist is safe.
* src/cache/ftccache.h (_FTC_FACE_ID_HASH): New hash
function to replace FTC_FACE_ID_HASH() for portability.
* src/cache/ftcmanag.h (FTC_SCALER_HASH): Replace
FTC_FACE_ID_HASH() by _FTC_FACE_ID_HASH().
* src/cache/ftccmap.c (FTC_CMAP_HASH): Ditto.
* src/cache/ftccache.h (FTC_NodeRec): The type of the
member `hash' is changed from FT_UInt32 to FT_PtrDist.
* src/cache/ftccache.h (FTC_Cache_Lookup): The type of the
argument `hash' is changed from FT_UInt32 to FT_PtrDist.
(FTC_Cache_NewNode): Ditto.
* src/cache/ftccache.c (ftc_cache_add): Ditto.
(FTC_Cache_Lookup): Ditto. (FTC_Cache_NewNode): Ditto.
* src/cache/ftcglyph.h (FTC_GCache_Lookup): Ditto.
* src/cache/ftcglyph.c (FTC_GCache_Lookup): Ditto.
* src/cache/ftcbasic.c (FTC_ImageCache_Lookup): The type
of the internal variable `hash' is changed to FT_PtrDist
from FT_UInt32. (FTC_ImageCache_LookupScaler): Ditto.
(FTC_SBitCache_Lookup): Ditto.
(FTC_SBitCache_LookupScaler): Ditto.
* src/cache/ftccmap.c (FTC_CMapCache_Lookup): Ditto.
* src/cache/ftccache.h (FTC_CACHE_LOOKUP_CMP): Ditto.
Also the type of the internal variable `_idx' is changed to
FT_PtrDist from FT_UInt32 for better pointer calculation.
FT_POINTER_TO_ULONG(), FTC_FACE_ID_HASH() and
FTC_IMAGE_TYPE_HASH() are enclosed by
FT_CONFIG_OPTION_OLD_INTERNALS and hidden from
normal clients.
For the history of these macros, see the investigation:
http://lists.gnu.org/archive/html/freetype/2010-10/msg00022.html
On LLP64 platforms (e.g. Win64), unsigned long (32-bit)
cannot cover the memory address (64-bit). FT_MEM_VAL() is
used for hashing only and not dereferred, so using signed
type FT_PtrDist is safe.
* src/base/ftdbgmem.c (FT_MEM_VAL): Change the type of the
return value from FT_ULong to FT_PtrDist.
(ft_mem_table_resize): The type of hash is changed to
FT_PtrDist. (ft_mem_table_get_nodep): Ditto.
On LLP64 platforms (e.g. Win64), long (32-bit) cannot cover
the memory address (64-bit). Also the casts from the pointer
type to long int should be removed to preserve the address
correctly.
* src/raster/ftraster.c (New_Profile): Replace "%lx" by "%p".
(End_Profile) Ditto.
* src/truetype/ttinterp.c (Init_Context): Ditto.
FT_MAX_CURVE_DEVIATION is dependent on the value of ONE_PIXEL.
* src/smooth/ftgrays.c (FT_MAX_CURVE_DEVIATION): Remove it and
replace it everywhere with ONE_PIXEL/8.
When a resource fork access rule by Darwin VFS could open the
resource fork but no font is found in it, the rest of rules
by Darwin VFS are skipped. It reduces the warnings of the
deprecated resource fork access method by recent Darwin kernel.
Fix MacPorts ticket #18859:
http://trac.macports.org/ticket/18859
* src/base/ftobjs.c (load_face_in_embedded_rfork):
When FT_Stream_New() returns FT_Err_Cannot_Open_Stream, it
means that the file is possible to be fopen()-ed but zero-sized.
Also there is a case that the resource fork is not zero-sized,
but no supported font exists in it. If a rule by Darwin VFS
falls into such cases, there is no need to try other Darwin VFS
rules anymore. Such cases are marked by vfs_rfork_has_no_font.
If it is TRUE, the Darwin VFS rules are skipped.
MacOS X/Darwin kernel supports a few tricky methods to access
a resource fork via ANSI C or POSIX interface. Current resource
fork accessor tries all possible methods to support all kernels.
But if a method could open a resource fork but no font is found,
there is no need to try other methods older than tested method.
To determine whether the rule index is for Darwin VFS, a local
function ftrfork.c::raccess_rule_by_darwin_vfs() is introduced.
To use this function in ftobjs.c etc but it should be inlined,
it is exposed by ftbase.h.
* src/base/ftrfork.c (FT_RFork_Rule): New enum type to identify
the rules to access the resource fork.
(raccess_guess_rec): New structure to bind the rule function and
rule enum type.
(FT_Raccess_Guess): The list of the rule functions is replaced by
(raccess_guess_table): This. This is exposed to be used by other
intra module functions.
(raccess_rule_by_darwin_vfs): A function to return a boolean
if the rule specified by the rule index is based on Darwin VFS.
builds/unix/ftsystem.c prevents to open an useless stream from
zero-sized file and returns FT_Err_Cannot_Open_Stream, but the
stream drivers for ANSI C, Amiga and VMS return useless streams.
For cross-platform consistency, all stream drivers should act
same.
* src/base/ftsystem.c (FT_Stream_Open): If the size of the opened
file is zero, FT_Err_Cannot_Open_Stream is returned.
* builds/amiga/src/base/ftsystem.c (FT_Stream_Open): Ditto.
* src/vms/ftsystem.c (FT_Stream_Open): Ditto.
Werner Lemberg